First off, dont listen to the other reviews. They are acessing the battery compartment wrong. Which is causing them to break it.
Second, this stock is amazing. Very sturdy and absolutely zero wobble. My gun is wired to the back and i can easily fit a 9.6v 1600mAh nunchuck battery. With the battery all the way pushed back it has about an inch and a half- two inches of give.(Room for bigger battery)
Third, to remove this stock you must retract the stock all the way. Then pull down on the lever directly above the knob, and pull back. It slides off perfectly and then you simply remove the little tabs and slide your nunchuck/crane stock battery in their respective holes.
-holds battery while keeping the gun from being back-heavy
-must be smarter than the stock and not remove the weakest part of the stock regularly to insert your battery.(Above method is much simpler and prolongs the life of this stock)
Rating: [5 of 5 Stars!]